The handbook of Technical irrigaTion informaTion - Hunter Industries

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Handbook of Technical Irrigation InformationPressure Loss Through Water MetersPRESSURE LOSS IN KILOPASCALS: (kPa)FlowMeter SizeFlowL/min 15mm 20mm 25mm 40mm L/min3.8 1.38 0.69 3.87.6 2.07 1.38 7.611.4 2.76 2.07 11.415.1 4.14 3.45 0.69 15.119.0 6.21 4.14 1.38 19.022.7 8.96 4.83 2.07 22.726.5 12.41 5.52 2.76 26.530.3 15.86 6.90 3.45 30.334.1 20.69 8.96 4.14 34.137.8 25.51 11.03 4.83 37.841.6 30.34 13.10 5.52 41.645.4 35.16 15.17 6.21 45.449.2 42.06 17.93 6.90 49.253.0 49.64 21.37 7.58 53.056.8 57.23 24.82 8.27 56.860.6 64.81 28.27 9.65 2.76 60.664.4 73.78 31.72 11.03 3.45 64.468.1 82.74 35.85 12.41 4.14 68.172.0 92.39 39.99 13.79 4.83 72.075.7 103.43 44.82 15.17 5.52 75.783.3 54.47 19.31 6.90 83.390.8 65.50 23.44 8.27 90.898.4 77.22 27.58 9.65 98.4106.0 89.64 31.72 11.03 106.0113.6 103.43 36.54 12.41 113.6121.1 41.37 14.48 121.1128.7 47.58 16.55 128.7136.3 53.78 18.62 136.3143.8 59.99 20.69 143.8151.4 66.19 22.75 151.4159.0 73.09 24.82 159.0166.5 80.67 26.89 166.5174.1 88.26 28.96 174.1181.7 95.84 31.03 181.7189.3 103.43 33.79 189.3196.8 36.54 196.8204.4 39.30 204.4212.0 42.75 212.0219.5 46.20 219.5227.1 49.64 227.1246.0 57.23 246.0265.0 67.57 265.0283.9 77.91 283.9302.8 88.26 302.8Note: The greatest pressure loss reflects the maximum safe capacity for the meter.124
Friction Loss ChartsLoss of Pressure Due to Friction in Ordinary Rubber HoseLOSS IN POUNDS PER SQ. INCH (PSI) PER 100 FEET OF LENGTH SIZES ½" THROUGH 5"Flow ofWaterin U.S.GPM ½ 5/8" ¾" 1" 1¼" 1½" 2" 2½" 3" 4" 5"0.5 0.401.5 3.02 1.01 0.422.5 7.75 2.58 1.085 27.80 9.27 3.86 0.95 0.32 0.1310 99.50 33.20 13.80 3.38 1.14 0.4715 71.00 29.60 7.25 2.45 1.01 0.25 0.0820 121.00 50.30 12.40 4.15 1.71 0.42 0.1425 76.50 18.70 6.34 2.60 0.64 0.2230 108.00 26.50 8.96 3.68 0.90 0.30 0.1335 142.00 34.80 11.80 4.83 1.18 0.40 0.1740 44.70 15.10 6.20 1.52 0.51 0.2145 55.00 18.60 7.65 1.87 0.63 0.2650 67.50 22.80 9.35 2.28 0.78 0.3260 94.30 31.80 13.10 3.19 1.08 0.4570 126.00 42.50 17.50 4.25 1.44 0.6080 50.60 22.50 5.48 1.86 0.7790 67.50 27.80 6.80 2.30 0.95 0.23100 81.50 33.50 8.19 2.78 1.15 0.28125 124.00 50.60 12.40 4.20 1.73 0.43150 72.10 17.60 5.97 2.46 0.60 0.20175 94.50 23.10 7.83 3.23 0.79 0.27200 122.00 29.60 10.10 4.15 1.02 0.34225 36.80 12.50 5.15 1.26 0.43250 44.60 15.20 6.25 1.53 0.52275 55.30 18.10 7.45 1.83 0.62300 62.50 21.20 8.75 2.15 0.73125
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Formulas - HydraulicsFriction Facto
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